New York Yankees -26, Cardinals - 10, Athletics - 9.
The New York Yankees with 5 between 1949-1953.
The New York Yankees have won the most World Series Championships with 27. The second is St. Louis Cardinals with 11.
The New York Yankees won the most World Series titles. As of 2009 the Yankees won 27 titles.
Most World Series won: New York Yankees - 27.
The New York Yankees have won the most World Series, with 27 championships. The St. Louis Cardinals are next, with 10 championships.